head to head · open source
langchain vs code2prompt
langchain has 146,562 GitHub stars, 24,508 forks, 492 open issues and last shipped today. code2prompt has 7,657 stars, 438 forks, 16 open issues and last shipped 7 days ago. langchain leads on adoption by 1,814% (146,562 vs 7,657 stars). langchain is written in Python under MIT; code2prompt is written in Rust under MIT. langchain has attracted 17% as many forks as stars, code2prompt 6%. langchain was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, chatgpt), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| langchain | code2prompt | |
|---|---|---|
| GitHub stars | ★ 147K | ★ 7.7K |
| License | MIT | MIT |
| Written in | Python | Rust |
| Last push | 2026-09-18 | 2026-09-11 |
| Forks | ⑂ 25K | ⑂ 438 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick langchain if
- You weight community size — 147K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick code2prompt if
- You want the code2prompt feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Rust
- You evaluated both and code2prompt fits your workflow better
About langchain
LangChain is an open source framework for building agents and LLM powered applications, written in Python and released under the MIT license. It lives in the AI and machine learning ecosystem, specifically among AI development platforms, and it works by chaining together interoperable components and third party integrations so that AI application development becomes simpler. The project describes itself as the agent engineering platform, and its abstractions are designed to keep applications working as the underlying technology evolves.
read the full langchain overview →
About code2prompt
code2prompt is a Rust command line tool, also shipped as a Python SDK and an MCP server, that ingests a codebase and formats it into a single LLM prompt with a source tree, prompt templating, and token counting, for developers and agent builders who need to hand repository context to ChatGPT, Claude, or GPT.
read the full code2prompt overview →
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Frequently asked questions
Is langchain or code2prompt more popular?
langchain has 146,562 GitHub stars and code2prompt has 7,657. langchain has the larger community by that measure.
Are langchain and code2prompt free?
Both are open source. langchain is licensed under MIT and code2prompt under MIT. Neither carries a licence fee.
What is the difference between langchain and code2prompt?
langchain is written in Python and code2prompt in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, langchain or code2prompt?
Choose langchain if you want the larger community (146,562 stars) or its MIT licence terms. Choose code2prompt if its feature set, stack or MIT licence fits better. Both are self-hostable.